This page highlights the date of when each MRMS build was made operational at NCEP Central Operations (NCO). The builds listed here will focus build updates that are related to or would influence the MRMS QPE products. The top of the table will start with the most recent build.
Please see the Current Updates and Past Updates page for more details on a number of the operational builds that were implemented over the last few years.
| MRMS Build Version | Date Implemented | Notes About Operational Build Update |
| v12.3.1 | Spring 2026 | [Coming Soon!] |
| v12.3.0 | 5 August 2025 | Support for WSR-88D VCP 34; Updates to specific attenuation R(A) and other variable with radar-derived QPE and data QC |
| v12.2.6 | 28 November 2023 | Accommodate new ECCC scanning strategies for Canadian radars |
| v12.2.0 | 22 April 2022 | Update for ECCC changing Canadian radars from C-band single-pol to S-band dual-pol configuration; Numerous radar QC algorithm updates; Bright band delineation update; Gauge ingest updates |
| v12.1.0 | 24 February 2021 | Addition of Alamosa, CO radar; Reduced MSQPE Pass 1, 2 latencies to 20-min, 60-min; New radar-only QPE (accumulation since 1200 UTC) |
| v12.0.0 | 14 October 2020 | Radar-only QPE utilizes synthetic dual-pol approach (previous Z-only); Evaporation correction of radar-only QPE; Blockage and wind farm updates; RQI logic update; New radar-only QPE (15-min accumulation); New Radar QPE Accumulation Quality Index (RAQI); Introduces MSQPE (replaces LGC radar QPE) and adds Pass 1, 2 structure; MRMS/FLASH products for oCONUS domains |
| v11.6.1 | 27 November 2018 | Updated color maps; Updated FLASH GRIB2 files and services |
| v11.5.4 | 17 May 2018 | Updates for new WSR-88D VCPs; Updated RQI logic and surface precip type; New MADIS gauge ingest; Updates to gauge QC logic |
| v11.0.0 | December 2016 | Implementation of FLASH; Addition of HRRR model data; Addition of PRISM data to British Columbia (Mountain Mapper for NWRFC); Reduced latency for gauge ingest and QC |
| v10.0.0 | September 2010 | Initial Operating Capabilities |